Cops investigate the UES block where the sidewalk gave way last night.Photo: Christopher Sadowski

A close-up of the collapsed sidewalk (Christopher Sadowski)

A heavyset woman caved through an Upper East Side sidewalk last night — dropping six feet into a huge hole where she was eventually pulled out by emergency crews using a crane-like rescue unit, authorities said.

The 31-year-old Queens woman was huddled up against the wall of Atomic Wings at the Blue Room Grill on the corner of East 60th Street and Second Avenue, seeking shelter from the rain while waiting for a bus, when the sidewalk below her gave way around 9:15 p.m., witnesses said.

“The woman was enormous. She had to be more than 300 pounds,” said Daniel Crumity, 44, of Queens, who watched in disbelief from a window inside the Blue Room. “The ground literally fell out from underneath her.